Sentences with phrase «on atmospheric carbon»

However, they provide very different «projections» of future atmospheric carbon dioxide concentration for the same assumed future anthropogenic emission... (1) the cause of the recent rise in atmospheric carbon dioxide concentration is not known, (2) the future development of atmospheric carbon dioxide concentration can not be known, and (3) any effect of future anthropogenic emissions of carbon dioxide on the atmospheric carbon dioxide concentration can not be known

What ever Australia does (even a 100 % cut in emissions) it is not going to have an impact on the atmospheric carbon growth rate, But a 25 % cut of world emissions would.

One concern is that harvesting massive amounts of naturally occurring seaweed for bioenergy could have comparable effects on atmospheric carbon dioxide and habitat loss or fragmentation as large - scale deforestation.

The report included a section on atmospheric carbon dioxide and climate change, written by prominent climate scientists Roger Revelle, Wallace Broecker, Charles Keeling, Harmon Craig, and J Smagorisnky.

Scroll down the Guardian's article to number 11, pausing to read Tamsin Edwards» section on atmospheric carbon dioxide levels at number 9 on the way down (unlike CO ₂ concentrations).

This result sheds new light on the effect of long - term fertilization by iron and macronutrients on carbon sequestration, suggesting that changes in iron supply from belowâ as invoked in some palaeoclimatic and future climate change scenarios11â may have a more significant effect on atmospheric carbon dioxide concentrations than previously thought.

Because soil is such a major player in the carbon cycle, even a small change in the amount of carbon it releases can have a big effect on atmospheric carbon concentrations.

Anomalies in the oceanic carbonate system recorded in marine sediments at the time3, for example while coral reefs were forming, apparently left no signature on atmospheric carbon dioxide concentrations.

«Using data series on atmospheric carbon dioxide and global temperatures we investigate the phase relation (leads / lags) between these for the period January 1980 to December 2011.

The effects on atmospheric carbon levels from landuse changes are highly uncertain, as I'm sure Ruddiman knows.

But with that see - saw battle going on in the tropics, the result was that overall, tropical forests» impact on atmospheric carbon dioxide was a wash - deforestation emitted about the same amount that was captured in forest growth.

«Significant increases in summer temperatures will affect the carbon cycling in the lakes, with potential consequences on atmospheric carbon dioxide levels and the Earth's climate,» he added.

Moreover, the impressive breadth of Ruether's argument makes her susceptible to criticism from a variety of quarters: biblical scholars may disagree with her interpretation of Paul; environmental scientists, with her figures on atmospheric carbon dioxide content; and agricultural and nutritional experts, with her recipe for relying on consumption of seasonal, locally produced foods.

Not exact matches

The Initiative is based on the finding that «4 ‰» annual growth rate of the soil carbon stock would make it possible to stop the present increase in atmospheric CO2 and aims to use a range of agricultural systems to sequester CO2 and store it in the ground as soil organic carbon (SOC).

GREENHOUSE GASSED In a long - running field experiment in Minnesota, scientists are studying the effects of rising atmospheric carbon dioxide levels on plots of grassland.

The Amazon's tropical forests are one of the largest sinks for atmospheric carbon dioxide on the planet.

Random fluctuations and three physical reasons come into question to explain this: The model calculations are based on different amounts of radiant energy from the sun that impinge on Earth's surface and are stored as a result of the greenhouse effect, e.g. due to atmospheric carbon dioxide.

Ocean acidification, which is a direct consequence of increased atmospheric carbon dioxide levels, is expected to have a deleterious effect on many marine species over the next century.

An international team examining the impact of ocean acidification on coral has found that a key reef - building coral can, over a relatively short period of time, acclimate to a doubling of atmospheric carbon dioxide levels.

The indirect effects of rising atmospheric carbon dioxide (CO2) levels, such as changes in soil moisture and plant structure, can have a bigger impact on ecosystems than previously thought.

Previously, scientists had relied on these sorts of soil sample measurements primarily to study plant types and atmospheric carbon dioxide levels.

About 6000 years ago, levels of atmospheric carbon dioxide rose — and until now slash - and - burn by the 12 million humans on the planet at the time has been blamed.

This can have a direct effect on the amount of atmospheric carbon incorporated into the soil.

To explain this apparent paradox, the researchers called upon a theory for how the global carbon cycle, atmospheric carbon dioxide and Earth's temperature are linked on geologic timescales.

The event commemorates the 5 November 1965 President's Council of Advisors on Science and Technology (PCAST) report to President Lyndon B. Johnson, which warned that the accumulation of atmospheric carbon dioxide from the burning of fossil fuels would «almost certainly cause significant changes» to the environment.

Climate change's negative effects on plants will likely outweigh any gains from elevated atmospheric carbon dioxide levels

This global biological recordbased on daily observations of ocean algae and land plants from NASAs Sea - viewing Wide Field - of - View Sensor (SeaWiFS) missionwill enable scientists to study the fate of atmospheric carbon, terrestrial plant productivity and the health of the oceans food web.

Franck Montmessin of the LATMOS atmospheric research centre in France says ozone forms when sunlight breaks up carbon dioxide molecules on the planet's daylight side.

Previous studies have suggested that temperature and, more specifically, atmospheric carbon dioxide levels influence body size more via an indirect impact on food availability and nutritional content.

As the world transitioned to glacial periods, on the other hand, atmospheric carbon dioxide decreased.

The future impacts of anthropogenic global change on marine ecosystems are highly uncertain, but insights can be gained from past intervals of high atmospheric carbon dioxide partial pressure.

During the PETM, atmospheric carbon dioxide more than doubled and global temperatures rose by 5 degrees Celsius, an increase that is comparable with the change that may occur by later next century on modern Earth.

These partners are called heterotrophs, since they rely on the anammox bacteria — which are primary producers (or autotrophs), like plants capable of photosynthesis — to turn atmospheric carbon dioxide into organic carbon.

Certainly, the only way to stop the massive increase in atmospheric carbon dioxide is to impose a charge, either on emissions or fuel, and to allow competition to provide the cheapest alternative.

Scientists on the Indian - German expedition, known as LOHAFEX, grew a 300 - km2 patch of algae in hopes that the plants» carbon would fall kilometers below, taking with it the atmospheric carbon it had pulled in during growth.

«Influence of increasing carbon dioxide levels on the seabed: Storing CO2 below the seabed is one way to counteract increasing atmospheric CO2 - levels.

From a quarter to half of Earth's vegetated lands has shown significant greening over the last 35 years largely due to rising levels of atmospheric carbon dioxide, according to a new study published in the journal Nature Climate Change on April 25.

Your article on adding iron to patches of ocean to encourage plankton growth and so capture atmospheric carbon (21 July,...

The first explanation is based on global climate change: Scientists have shown that atmospheric carbon dioxide levels declined steadily since the beginning of the Cenozoic Era, 66 million years ago.

On May 9, instruments atop Hawaii's Mauna Loa volcano pegged the atmospheric concentration of carbon dioxide (CO2)-- the gas that contributes most to global warming — at slightly above 400 parts per million (ppm).

«Human influence is so dominant now,» Baker asserts, «that whatever is going to go on in the tropics has much less to do with sea surface temperatures and the earth's orbital parameters and much more to do with deforestation, increasing atmospheric carbon dioxide and global warming.»

The model also accounted for natural drivers of change, including the direct influence of increased carbon dioxide on ocean - carbon uptake and the indirect effect that a changing climate has on the physical state of the ocean and its relationship to atmospheric carbon dioxide.

They are also considered the largest «carbon sink» of atmospheric carbon dioxide on Earth.

«We found that the Antarctic microbes have evolved mechanisms to live on air instead, and they can get most of the energy and carbon they need by scavenging trace atmospheric gases, including hydrogen and carbon monoxide,» she says.

«We found that atmospheric carbon dioxide clearly seems to have had the largest effect on the increase in flowers.»

Effect of increased concentrations of atmospheric carbon dioxide on the global threat of zinc deficiency: a modelling study.

«OCO - 2 was designed to help locate and identify natural regional processes that serve as sources and sinks of atmospheric carbon dioxide, and how these vary with time and location,» explained Annmarie Eldering, a NASA scientist working on the mission.

The World Energy Outlook suggests that unambitious pledges made at last year's United Nations Framework Convention on Climate Change conference in Copenhagen will mean that much tougher action is needed after 2020 if the world is to meet the goal of limiting atmospheric carbon dioxide (CO2) to 450 parts per million (p.p.m.).

Columbia University physicist Peter Eisenberger created an effective model that proves, through real world testing, that carbon sequestration can be used on a global scale and can prevent the atmospheric levels of carbon dioxide from ever exceeding 450 ppm, below dangerous levels.

Receding Himalayan glaciers Almost six years ago, I was the editor of a single - topic issue on energy for Scientific American that included an article by Princeton University's Robert Socolow that set out a well - reasoned plan for how to keep atmospheric carbon dioxide concentrations below a planet - livable threshold of 560 ppm.